@Tara786
If you cancelled that booking then you are at fault under airbnb's T&C
So rule number 1 is never cancel a booking always tell the guest to do it,They could have done it for Free,
I know you said you are new to airbnb but you really need to sit down and study how this business works I mean the STR business otherwise it's going to cost you money,
Here in the CC is a wealth of information and maybe join some FB groups,
There are many YT video's you can watch you will pickup snippet's of info,